I could offer some pointers when ya decide to make your own, but the pros at SRK know much more than I could ever know.
Also, that cool tray one looks like the ultimate arcade experience.
I've got a custom stick project underway too, I'll post a Cblog detailing the process once I'm done as I'm aiming for a Feb 20th deadline (for obvious reasons hehehe)
Right on dude, this stuff is like an underground art. So many crazy designs! This one will always boggle my mind, a guy named BigPockets designed this Akuma stick.

am i the first to notice the obvious placement of the chun li?
joystick chun li peep anyone?
...just sayin

Here are some movies of the sticks a friend and i made.
And please take easy on me, because of the button layout. I know its not perfect, but we wanted it to be similiar to the SNES Pad. I guess i will make some chances until SF4 comes out.
Making of:
http://www.vimeo.com/2501893
Sticktest 1 (Yep, i sucked at that time :D)
http://www.youtube.com/watch?v=A9_HJgc-Fy
Sticktest 2 (contiunuing to suck)
http://www.youtube.com/watch?v=ylqKkQ1nWas
Friends Stick
http://www.youtube.com/watch?v=A9_HJgc-Fy4

surf dtoid with 

Rising (10+)
People you follow

















follow